Question

By selling 8 dozen pencils, a shopkeeper gains the selling price of one dozen pencils. Find his gain per cent.
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Answer 1

Data given :-

suppose shopkeeper sells only 1 dozen pencil their price will be = 1A

→ we know that the amount of 8 dozen pencil will be = 8A

answer :-

S.P = selling price

C.P = cost price

Now we have to find profit for selling 1 dozen pencil

profit = (selling price of 1 dozen ) = A

C.P = 8A- A = 7A ( cost price of 8 dozen )

S.P = C.P + gain

S.P of 8 dozen = C.P of 7 dozen + 1 dozen profit

S.P ( 7 dozen ) = C.P ( 8 dozen )

by selling 7 dozen product he get 1 dozen gain

profit % = gain ÷ C.P × 100

= 1 ÷ 7 × 100

= 0.1428 × 100

= 14.28 %

profit will be 14.28 %

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